83580421 has 2 divisors, whose sum is σ = 83580422. Its totient is φ = 83580420.

The previous prime is 83580361. The next prime is 83580439. The reversal of 83580421 is 12408538.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81703521 + 1876900 = 9039^2 + 1370^2 .

It is a cyclic number.

It is not a de Polignac number, because 83580421 - 2¹⁹ = 83056133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83580461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41790210 + 41790211.

It is an arithmetic number, because the mean of its divisors is an integer number (41790211).

Almost surely, 2^83580421 is an apocalyptic number.

It is an amenable number.

83580421 is a deficient number, since it is larger than the sum of its proper divisors (1).

83580421 is an equidigital number, since it uses as much as digits as its factorization.

83580421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 83580421 is about 9142.2328235503. The cubic root of 83580421 is about 437.2215083141.

Adding to 83580421 its reverse (12408538), we get a palindrome (95988959).

The spelling of 83580421 in words is "eighty-three million, five hundred eighty thousand, four hundred twenty-one".